I still have faith in Nintendo Handhelds. They always get those right, and get a lot of 3rd party support. Now home consoles? I think Nintendo lost their touch with home consoles. Unless the NX is super amazing I will probably skip it, I will however always get Nintendo Handhelds. Especially now since Sony announced they are basically bowing out of the handheld market for good. No Vita 2 or anything else. Vita is it.
I haven't played them all. I've played A Link to the Past (my favorite Zelda, and arguably one of the best games ever) Links Awakening, A Link Between Worlds, Twilight Princess, and Ocarina of Time.
The new Zelda was supposed to release this year, but got pushed to 2017 so the Wii U release can coincide with the NX release.